The company, popularly known as Bell, added 88,611 net postpaid wireless subscribers in the second quarter, and the average monthly bill for its wireless customers rose 4.6 percent to C$67.28. Both results helped the unit deliver double-digit profit and revenue growth.

But investors and analysts focused on lower-than-expected customer growth for the internet and Fibe TV services, which the company blamed on tough competition in areas where it has yet to build out a more advanced fixed-line network. Montreal-based BCE's shares were down 0.7 percent at midday.

"Wireless saves the day again," Desjardins analyst Maher Yaghi wrote in a note.

However, Yaghi said BCE's fixed-line results should improve next year, once a network upgrade is largely completed in the Toronto area.

While wireless powers BCE's overall growth, the company still gets more revenue from selling fixed-line internet, television and telephone services, and it is investing heavily in network upgrades to compete with cable rivals Rogers Communications Inc and Quebecor Inc's Videotron.

"We're just working as fast as the team can go to get this program executed on," said Chief Executive Officer George Cope.

Excluding special items, the unit's earnings before interest, taxes, depreciation and amortization only rose by 2.6 percent due to higher costs and a C$22 million hit from a regulatory ruling that lowered rates BCE can charge internet resellers for wholesale access to its network.

Net income attributable to BCE shareholders fell to C$762 million, or 84 Canadian cents per share, from C$778 million, or 89 Canadian cents per share, a year earlier, in part because of amortization of the Manitoba Telecom purchase price.

Earnings excluding special items came to 88 Canadian cents a share, 1 cent above expectations.